51235427693 has 16 divisors (see below), whose sum is σ = 54930234240. Its totient is φ = 47663960256.

The previous prime is 51235427687. The next prime is 51235427809. The reversal of 51235427693 is 39672453215.

It is a cyclic number.

It is not a de Polignac number, because 51235427693 - 2¹⁸ = 51235165549 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51235421693) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2362646 + ... + 2384232.

It is an arithmetic number, because the mean of its divisors is an integer number (3433139640).

Almost surely, 2^51235427693 is an apocalyptic number.

It is an amenable number.

51235427693 is a deficient number, since it is larger than the sum of its proper divisors (3694806547).

51235427693 is a wasteful number, since it uses less digits than its factorization.

51235427693 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24436.

The product of its digits is 1360800, while the sum is 47.

The spelling of 51235427693 in words is "fifty-one billion, two hundred thirty-five million, four hundred twenty-seven thousand, six hundred ninety-three".